diff --git a/pkgs/development/libraries/haskell/haskell-platform/2010.1.0.0.nix b/pkgs/development/libraries/haskell/haskell-platform/2010.1.0.0.nix
index a5107a5fe03..8c1630752ec 100644
--- a/pkgs/development/libraries/haskell/haskell-platform/2010.1.0.0.nix
+++ b/pkgs/development/libraries/haskell/haskell-platform/2010.1.0.0.nix
@@ -22,5 +22,6 @@ cabal.mkDerivation (self : {
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
     maintainers = with self.stdenv.lib.maintainers; [andres simons];
+    broken = true;              # The source code is no longer available from haskell.org.
   };
 })